Ejection assembly and electronic device

ABSTRACT

An electronic device includes a screen assembly, a back cover, a middle frame, and an ejection assembly. A length of the middle frame in a first direction is less than those of the screen assembly and the back cover in the first direction, and a mounting portion is formed by the screen assembly, the middle frame, and the back cover. The ejection assembly includes at least one driving mechanism, a first decorative member, a second decorative member, and at least one lifting mechanism. Driven by the at least one driving mechanism, the at least one lifting mechanism is capable of driving the first decorative member and the second decorative member to move away from each other, such that the first decorative member is substantially flush with the screen assembly, and the second decorative member is substantially flush with the back cover.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a continuation application of co-pending patent application Ser.No. 16/215,447, filed on Dec. 10, 2018, the contents of which are hereinincorporated by reference in their entireties.

TECHNICAL FIELD

The described embodiments relate to electronic devices, and inparticular, to an ejection assembly and an electronic device comprisingthe ejection assembly.

BACKGROUND

Maximizing a screen ratio of a mobile phone is the main developmentdirection of the mobile phone in the future. In order to improve thescreen ratio of the mobile phone, in the related art, multiple methodsare used. The methods for improving the screen ratio include: using anindependent pop-up camera, bone conduction technology, a front cameraarranged at the bottom, and the like. However, when using theindependent pop-up camera, a hole need to be defined in the housing ofthe mobile phone, and the camera partially protrudes out of the housing,which affects the overall appearance of the mobile phone. When using thebone conduction technology, it is possible to avoid defining the hole inthe housing, however, the sound quality is poor. The front cameraarranged at the bottom may also be used, however, the user experience ispoor.

SUMMARY

In one aspect, an electronic device may be provided. The electronicdevice may include a screen assembly, a back cover opposite to thescreen assembly, a middle frame sandwiched between the screen assemblyand the back cover, an ejection assembly. A length of the middle framein a first direction is less than a length of the screen assembly in thefirst direction, and less than a length of the back cover in the firstdirection, such that a mounting portion may be formed by the screenassembly, the middle frame, and the back cover. The ejection assemblymay be movably disposed in the mounting portion. The ejection assemblymay include at least one driving mechanism, a first decorative member, asecond decorative member, and at least one lifting mechanism. The seconddecorative member may be disposed opposite to and spaced apart from thefirst decorative member. The first decorative member and the seconddecorative member may be movable toward each other or away from eachother. The at least one lifting mechanism may be disposed between thefirst decorative member and the second decorative member. Each of the atleast one lifting mechanism may be connected to the correspondingdriving mechanism. Driven by the at least one driving mechanism, the atleast one lifting mechanism may be capable of driving the firstdecorative member and the second decorative member to move away fromeach other, such that the first decorative member is substantially flushwith the screen assembly, and the second decorative member issubstantially flush with the back cover.

In another aspect, an electronic device may be provided. The electronicdevice may include a screen assembly, a back cover opposite to thescreen assembly, a middle frame sandwiched between the screen assemblyand the back cover, and an ejection assembly. The middle frame includesa pair of spaced and parallel external walls engaged with the screenassembly and the back cover; each of the external walls has a top lowerthan tops of the screen assembly and the back cover, and a mountingportion may be defined by the tops of the screen assembly, the middleframe, and the back cover. The ejection assembly may be movably disposedin the mounting portion, and has a first position at which the ejectionassembly partially extends out of the mounting portion and a secondposition at which the ejection assembly is received in the mountingportion. The ejection assembly may include a first decorative member, asecond decorative member opposite to and spaced apart from the firstdecorative member, at least one lifting mechanism, and at least onedriving mechanism. The first decorative member and the second decorativemember may be movable toward each other or away from each other. The atleast one lifting mechanism may be disposed between the first decorativemember and the second decorative member, and configured to drive thefirst decorative member and the second decorative member to move awayfrom each other when the ejection assembly is at the first position,such that the first decorative member may be substantially flush withthe screen assembly, and the second decorative member may besubstantially flush with the back cover. The at least one drivingmechanism may be connected to each of the at least one liftingmechanism.

In a further aspect, an ejection assembly for an electronic device maybe provided. The electronic device may include a back cover, a screenassembly covering the back cover, and a middle frame sandwiched betweenthe screen assembly and the back cover. A length of the middle frame ina first direction is less than a length of the screen assembly in thefirst direction, and less than a length of the back cover in the firstdirection, such that a mounting portion is formed by the screenassembly, the middle frame, and the back cover. The ejection assemblymay be movably disposed in the mounting portion and has a first positionat which the ejection assembly partially extends out of the mountingportion and a second position at which the ejection assembly is receivedin the mounting portion. The ejection assembly may include at least onedriving mechanism, a first decorative member, a second decorativemember, and at least one lifting mechanism. The second decorative membermay be disposed opposite to and spaced apart from the first decorativemember. The first decorative member and the second decorative member maybe movable toward each other or away from each other. The at least onelifting mechanism may be disposed between the first decorative memberand the second decorative member. Each of the at least one liftingmechanism may be connected to the corresponding driving mechanism.Driven by the at least one driving mechanism, the at least one liftingmechanism may be capable of driving the first decorative member and thesecond decorative member to move away from each other when the ejectionassembly is at the first position, such that the first decorative memberis substantially flush with the screen assembly, and the seconddecorative member is substantially flush with the back cover.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the technical solutions in the embodiments of thepresent disclosure more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments.Apparently, the accompanying drawings in the following description aremerely some embodiments of the present disclosure, for those skilled inthe art, other drawings can be obtained based on these drawings withoutcreative efforts.

FIG. 1 is a schematic structural view of an electronic device accordingto some embodiments of the present disclosure.

FIG. 2 is a partially exploded view of the electronic device shown inFIG. 1 along one direction according to some embodiments of the presentdisclosure.

FIG. 3 is a partially exploded view of the electronic device shown inFIG. 1 along another direction according to some embodiments of thepresent disclosure.

FIG. 4A is a sectional view of the electronic device shown in FIG. 1taken along line 4A-4A according to some embodiments of the presentembodiment; wherein the electronic device is in a first state.

FIG. 4B is a sectional view of the electronic device shown in FIG. 1taken along 4B-4B direction according to some embodiments of the presentembodiment; wherein the electronic device is in the first state.

FIG. 5 is a schematic view showing a front side of the electronic deviceshown in FIG. 1 according to some embodiments of the present embodiment;wherein a first decorative member and a second decorative member has notbeen lifted.

FIG. 6 is a schematic view showing a rear side of the electronic deviceshown in FIG. 1 according to some embodiments of the present embodiment;wherein the first decorative member and the second decorative member hasnot been lifted.

FIG. 7 is an exploded view of an ejection assembly of the electronicdevice shown in FIG. 2 along another direction; wherein a drivingmechanism has been removed.

FIG. 8 is a schematic structural view of a middle frame and the drivingmechanism of the electronic device shown in FIG. 2 along anotherdirection.

FIG. 9A is a side view of the middle frame and the driving mechanism ofthe electronic device shown in FIG. 8.

FIG. 9B is a sectional view of the middle frame and the drivingmechanism of the electronic device shown in FIG. 9A taken along line9B-9B.

FIG. 10A is a sectional view of the electronic device shown in FIG. 4Aaccording to some embodiments of the present embodiment; wherein theelectronic device is in a second state.

FIG. 10B is a sectional view of the electronic device shown in FIG. 4Baccording to some embodiments of the present embodiment; wherein theelectronic device is in the second state.

FIG. 11A is a sectional view of the electronic device shown in FIG. 4Aaccording to some embodiments of the present embodiment; wherein theelectronic device is in a third state.

FIG. 11B is a sectional view of the electronic device shown in FIG. 4Baccording to some embodiments of the present embodiment; wherein theelectronic device is in the third state.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present disclosurewill be clearly and completely described in detail below with referenceto the accompanying drawings in the embodiments of the presentdisclosure. Apparently, the embodiments described herein are only someexemplary embodiments, not all the embodiments. Based on the embodimentsdescribed in the present disclosure, one skilled in the art may acquireall other embodiments without any creative efforts. All these shall becovered within the protection scope of the present disclosure.

Terms such as “first”, “second”, “third”, and the like are used hereinfor purposes of description, and are not intended to indicate or implyrelative importance or significance or to imply the number of indicatedtechnical features. Thus, features defined with “first”, “second” and“third” may explicitly or implicitly include at least one of thefeatures. In the description of the present disclosure, “a plurality of”means two or more, such as two, three, and the like, unless specifiedotherwise. All directional indications (such as up, down, left, right,front, back, and the like) in some embodiments of the present disclosureare only used to explain the relative positional relationship betweencomponents in a certain state (as shown in the figures), the movementsituation, and the like; if the specific state changes, the directionalindication also changes accordingly. Moreover, the terms “comprise”,“include” or any other variations thereof are meant to covernon-exclusive including. For example, processes, methods, systems,articles or devices comprising a series of steps or elements do not onlyinclude those steps or elements, but also include other steps orelements that are not explicitly listed or also include the inherentsteps or elements of the processes, methods, systems, articles ordevices.

The term “embodiment” in the present disclosure indicates the specificfeatures, structures, or characteristics may be included in at least oneembodiment of the present disclosure. The terms appearing in differentin various positions of the specification may not indicate the sameembodiment, and may not indicate that the embodiment is independentfrom, alternative, or exclusive from other embodiments. Those skilled inthe art may explicitly or implicitly understand that, the embodiment ofthe present disclosure may be combined with other embodiments.

In the description of the embodiments of the present disclosure, itshould be understood that, the orientation or positional relationshipindicated by the term “thickness” and the like is based on theorientation or positional relationship shown in the drawings, and ismerely for convenience of description and for simplifying description,rather than implying or indicating that the device or the component musthave a particular orientation or constructed and operated in aparticular orientation, and thus these terms cannot to be construed aslimiting the present disclosure.

In one aspect, an electronic device may be provided. The electronicdevice may include a screen assembly, a back cover opposite to thescreen assembly, a middle frame sandwiched between the screen assemblyand the back cover, an ejection assembly. A length of the middle framein a first direction is less than a length of the screen assembly in thefirst direction, and less than a length of the back cover in the firstdirection, such that a mounting portion may be formed by the screenassembly, the middle frame, and the back cover. The ejection assemblymay be movably disposed in the mounting portion. The ejection assemblymay include at least one driving mechanism, a first decorative member, asecond decorative member, and at least one lifting mechanism. The seconddecorative member may be disposed opposite to and spaced apart from thefirst decorative member. The first decorative member and the seconddecorative member may be movable toward each other or away from eachother. The at least one lifting mechanism may be disposed between thefirst decorative member and the second decorative member. Each of the atleast one lifting mechanism may be connected to the correspondingdriving mechanism. Driven by the at least one driving mechanism, the atleast one lifting mechanism may be capable of driving the firstdecorative member and the second decorative member to move away fromeach other, such that the first decorative member is substantially flushwith the screen assembly, and the second decorative member issubstantially flush with the back cover.

In some embodiments, each of the at least one lifting mechanism mayinclude a first bevel gear, a second bevel gear, a first lead screw, anda push rod. The first bevel gear may have an axis substantially parallelto the first direction, and may be coupled to one of the at least onedriving mechanism. The second bevel gear, may have an axis substantiallyparallel to a second direction, and may be engaged with the first bevelgear. The second direction may be perpendicular to the first direction.The first lead screw may be disposed coaxially with the second bevelgear, and define a first groove. The push rod may be adjacent to thefirst lead screw and extending in a direction substantially parallel tothe second direction. One end of the push rod may be inserted in thefirst groove, and the other end of the push rod may cooperate with thefirst decorative member and the second decorative member, such that thepush rod pushes the first decorative member and the second decorativemember to move away from each other. In some embodiments, the push rodmay include: a rod body, a first inserting portion, and a pushingportion. The rod body may be disposed at a side wall of the rod bodythat faces towards the first lead screw, the first inserting portion maybe inserted into the first groove. The pushing portion may be disposedat one end of the rod body along the second direction, the pushingportion may cooperate with the first decorative member and the seconddecorative member to push the first decorative member and the seconddecorative member to move away from each other.

In some embodiments, the pushing portion may include a pair of firstinclined surfaces opposite to each other. The first decorative membermay include a second inclined surface, and the second decorative membermay include a third inclined surface. The second inclined surface maycooperate with one of the pair of first inclined surfaces, while thethird inclined surface may cooperate with the other of the pair of firstinclined surfaces.

In some embodiments, each of the at least one driving mechanism mayinclude a driving member, a fixing member, and a transmission shaft. Thedriving member may be disposed on the middle frame via the fixingmember, and the transmission shaft may be adjacent to an output shaft ofthe driving member along the first direction. The transmission shaft maypass through the middle frame and be further connected to the firstbevel gear.

In some embodiments, the ejection assembly may further include abracket. The bracket may further include an outer frame and a supportingbody. The outer frame may extend around a periphery of the supportingbody, the lifting mechanism may be disposed on the supporting body.

In some embodiments, a mounting post is disposed at one end of the firstlead screw that is away from the second bevel gear, and the supportingbody defines a mounting hole; the first lead screw is mounted in themounting hole via the mounting post.

In some embodiments, the supporting body may have a first surface and asecond surface opposite to the first surface. A first receiving portion,a second receiving portion, and a third receiving portion may besequentially arranged on the first surface of the supporting body andcorrespond to each of the at least one lifting mechanism. The firstreceiving portion may extend along the first direction. The secondreceiving portion may be communicated with the first receiving portion,and extend along the second direction. The third receiving portion maybe disposed at one side of the second receiving portion that is awayfrom the first receiving portion, communicated with the second receivingportion, and extend through two opposite side faces of the supportingbody. The first bevel gear may be disposed in the first receivingportion, and the second bevel gear and the first lead screw may bedisposed at one side of the second receiving portion. A portion of thepush rod may be disposed at the other side of the second receivingportion, and the other portion of the push rod may be disposed in thethird receiving portion. The push rod may extend out of the thirdreceiving portion, and cooperate with the first decorative member andthe second decorative member.

In some embodiments, the supporting body may further include a guidingblock, and the guiding block may be disposed on the second receivingportion. The push rod may define a guiding groove in the seconddirection, and the guiding block may be inserted into the guidinggroove.

In some embodiments, the ejection assembly may further include aprotective cover; the protective cover is disposed on the first surface,located between the supporting body and the second decorative member,and covers the first receiving portion and the second receiving portion.

In some embodiments, the supporting body has a first surface and asecond surface opposite to the first surface. A fourth receiving portionmay be arranged on the second surface of the supporting body. At leastone functional device may be disposed at one side of the firstdecorative member that is close to the supporting body. When the firstdecorative member is disposed on the supporting body, the at least onefunctional device may be disposed in the fourth receiving portion.

In some embodiments, one of the at least one functional device may beprovided with a first magnetic member, and the ejection assembly mayfurther include a second magnetic member. The second magnetic member maybe disposed on the second decorative member. A reserved portion may bearranged on the supporting body at a position corresponding to thesecond magnetic member. When the first decorative member and the seconddecorative member are driven to move away from each other and the pushrod does not push against the first decorative member and the seconddecorative member, the first magnetic member and the second magneticmember may attract each other, such that the first decorative member andthe second decorative member may move toward each other, and the firstdecorative member and the second decorative member may be reset.

In some embodiments, the ejection assembly may further include anejecting mechanism and a second inserting portion. The ejectingmechanism may further include at least one second lead screw. Each ofthe at least one second lead screw may be disposed between the drivingmechanism and the first bevel gear. Each of the at least one second leadscrew rod may define a second groove. The second inserting portion maybe disposed corresponding to the at least one second lead screw. Thesecond inserting portion is inserted into the second groove.

In some embodiments, the first groove may include a slow-moving sectionand a first fast-moving section, and the second groove may include asecond fast-moving section and an idle section. When the first insertingportion is located in the slow-moving section, the second insertingportion may be located in the second fast-moving section. When the firstinserting portion is located in the first fast-moving section, thesecond inserting portion may be located in the idle section.

In some embodiments, the ejection assembly may further include abracket, and the bracket comprises an outer frame and a supporting body;the outer frame extends around a periphery of the supporting body. Eachfree end of the outer frame may protrude outwardly to form a guidingportion, and the guiding portion may be disposed adjacent to the secondinserting portion. The guiding portion may be inserted into one side ofthe middle frame, such that a smooth outer surface may be formed by theguiding portion and the middle frame.

In another aspect, an electronic device may be provided. The electronicdevice may include a screen assembly, a back cover opposite to thescreen assembly, a middle frame sandwiched between the screen assemblyand the back cover, and an ejection assembly. The middle frame includesa pair of spaced and parallel external walls engaged with the screenassembly and the back cover; each of the external walls has a top lowerthan tops of the screen assembly and the back cover, and a mountingportion may be defined by the tops of the screen assembly, the middleframe, and the back cover. The ejection assembly may be movably disposedin the mounting portion, and has a first position at which the ejectionassembly partially extends out of the mounting portion and a secondposition at which the ejection assembly is received in the mountingportion. The ejection assembly may include a first decorative member, asecond decorative member opposite to and spaced apart from the firstdecorative member, at least one lifting mechanism, and at least onedriving mechanism. The first decorative member and the second decorativemember may be movable toward each other or away from each other. The atleast one lifting mechanism may be disposed between the first decorativemember and the second decorative member, and configured to drive thefirst decorative member and the second decorative member to move awayfrom each other when the ejection assembly is at the first position,such that the first decorative member may be substantially flush withthe screen assembly, and the second decorative member may besubstantially flush with the back cover. The at least one drivingmechanism may be connected to each of the at least one liftingmechanism.

In a further aspect, an ejection assembly for an electronic device maybe provided. The electronic device may include a back cover, a screenassembly covering the back cover, and a middle frame sandwiched betweenthe screen assembly and the back cover. A length of the middle frame ina first direction is less than a length of the screen assembly in thefirst direction, and less than a length of the back cover in the firstdirection, such that a mounting portion is formed by the screenassembly, the middle frame, and the back cover. The ejection assemblymay be movably disposed in the mounting portion and has a first positionat which the ejection assembly partially extends out of the mountingportion and a second position at which the ejection assembly is receivedin the mounting portion. The ejection assembly may include at least onedriving mechanism, a first decorative member, a second decorativemember, and at least one lifting mechanism. The second decorative membermay be disposed opposite to and spaced apart from the first decorativemember. The first decorative member and the second decorative member maybe movable toward each other or away from each other. The at least onelifting mechanism may be disposed between the first decorative memberand the second decorative member. Each of the at least one liftingmechanism may be connected to the corresponding driving mechanism.Driven by the at least one driving mechanism, the at least one liftingmechanism may be capable of driving the first decorative member and thesecond decorative member to move away from each other when the ejectionassembly is at the first position, such that the first decorative memberis substantially flush with the screen assembly, and the seconddecorative member is substantially flush with the back cover.

Referring to FIG. 1, an electronic device 100 according to someembodiments of the present disclosure may be depicted. In someembodiments, the electronic device 100 may be a mobile phone. It can beunderstood that, in other embodiments, the electronic device 100 may notbe limited to a mobile phone; instead, the electronic device 100 mayalso be a tablet, a laptop, a desktop, a television, and the like.Referring to FIG. 2 together, the electronic device 100 may include amiddle frame 10, a control assembly 20, a screen assembly 30, a backcover 40, an ejection assembly 70, and a bottom decorative member 80.The screen assembly 3Q may cover the back cover 40. The middle frame 10may be substantially in shape of a closed frame, and sandwiched betweenthe screen assembly 30 and the rear cover 40, such that the middle frame10, the screen assembly 30, and the rear cover 40 cooperatively define areceiving space 11. The middle frame 10 may have a first end 13 and asecond end 15 opposite to the first end 13. The control assembly 20 maybe mounted in the receiving space 11. More specifically, the controlassembly 20 may include a main board 21 and a battery 23. In oneembodiment, the main board 21 may be received in the receiving space 11,and close to the first end 13. The battery 23 may also be disposed inthe receiving space 11, adjacent to the main board 21, and further closeto the second end 15. The screen assembly 30 and the rear cover 40 mayrespectively cover on two opposite sides of the middle frame 10. Thus,the main board 21 and the battery 23 may be arranged between the screenassembly 30 and the rear cover 40. For convenience of description, afirst direction 200 and a second direction 300 are defined in thepresent disclosure. The first direction 200 refers to a directionstarting from the second end 15 of the middle frame 10 to the first end13 of the middle frame 10. The second direction 300 refers to adirection that is located in a same plane as the first direction 200,and the second direction 300 is perpendicular to the first direction200. In this embodiment, the first direction 200 may be a lengthwisedirection of the electronic device 100, and the second direction 300 maybe a width direction of the electronic device 100. Of course, in otherembodiments, it is also possible that the first direction 200 may be awidth direction of the electronic device 100, and the second direction300 may be a lengthwise direction of the electronic device 100. Besides,the plane in which the first direction 200 and the second direction 300is located may be substantially parallel to the plane in which thescreen assembly 30 is located.

A size of the screen assembly 30 in the first direction 200 may besubstantially equal to that of the back cover 40. A size of the middleframe 10 (that is, a length of the middle frame 10) in the firstdirection 200 may be less than a length of the screen assembly 30 in thefirst direction 200, and less than a length of the back cover 40 in thefirst direction 200. Referring to FIG. 3 together, more specifically,the middle frame 10 may include a pair of spaced and parallel externalwalls 12 engaged with the screen assembly 30 and the back cover 40. Eachof the external walls 12 may have a top lower than tops of the screenassembly 30 and the back cover 40. The top of the screen assembly 30,the top of the middle frame 10, and the top of the rear cover 40 maycooperatively define a first mounting portion 50. The ejection assembly70 may be movably disposed in the first mounting portion 50, such thatthe ejection assembly 70 is capable of extending out of the firstmounting portion 50 or retracting into the first mounting portion 50.Herein, the top may refer to an edge of the corresponding component(such as the screen assembly 30, the middle frame 10, the rear cover 40,and the like) that is adjacent to the ejection assembly 70. For example,as for the middle frame 10, the top may be an edge disposed at the firstend 13. The screen assembly 30, the second end 15 of the middle frame10, and the rear cover 40 may cooperatively define a second mountingportion 60. The ejection assembly 70 may be mounted in the firstmounting portion 50. The bottom decorative member 80 may be mounted inthe second mounting portion 60.

Referring to FIG. 4A and FIG. 4B together, at least one reserved space57 may be defined between two sub-frames of the middle frame 10 and oneside of the main board 21 that is close to the first end 13. In someembodiments, two reserved space 57 may be defined. More specifically, afirst reserved portion 17 may be formed in each sub-frame of the middleframe 10, and a second reserved portion 25 may be formed in each side ofthe main board 21 that is close to the first end 13 respectively. Thefirst reserved portion 17 and the corresponding second reserved portion25 may communicate with each other, such that the reserved space 57 isdefined by the first reserved portion 17 and the corresponding secondreserved portion 25.

Referring to FIG. 5 and FIG. 6 together, the electronic device mayfurther include at least one functional device mounted on the ejectionassembly 70 (in the embodiment, the at least one functional devices mayinclude, for example, a camera 723 and a receiver 725). When theejection assembly 70 extends out of the first mounting portion 50, atleast one functional device can be seen, such that a user may use the atleast one functional device conveniently. When the ejection assembly 70retracts into the first mounting portion 50, at least one functionaldevice may be received in the first mounting portion 50, such that theat least one functional device may be protected by the screen assembly30 and the back cover 40, and cannot be seen from the outside of theelectronic device 100. A size of the first mounting portion 50 in anormal direction of the plane formed by the first direction 200 and thesecond direction 300 may be less than a maximum distance from an outersurface of the screen assembly 30 to an outer surface of the rear cover40, such that the ejection assembly 70 may be disposed in the firstmounting portion 50. Therefore, when the ejection assembly 70 protrudesout of the first mounting portion 50, a first step 31 may be formedbetween the ejection assembly 70 and the screen assembly 30, and asecond step 41 may be formed between the ejection assembly 70 and theback cover 40. The first step 31 and the second step 41 may affect theoverall appearance of the electronic device 100, and impurities mayeasily enter and may be further collected in the first step 31 and thesecond step 41.

In order to avoid forming the first step 31 and the second step 41, theelectronic device 100 may include the ejection assembly 70. Referring toFIG. 7, FIG. 8, FIG. 9A and FIG. 9B together, the ejection assembly 70may include at least one driving mechanism 71, a first decorative member72, a second decorative member 73, and at least one lifting mechanism74. In this case, the first decorative member 72 and the seconddecorative member 73 may be opposite to each other and spaced apart fromeach other. Besides, the first decorative member 72 and the seconddecorative member 73 may be movable toward each other or away from eachother.

Referring to FIG. 10A and FIG. 10B together, the at least one drivingmechanism 71 may be disposed in the corresponding reserved space 57, andmay be further fixed to the middle frame 10. Each driving mechanism 71may be coupled to the corresponding lifting mechanism 74. The at leastone lifting mechanism 74 may be disposed between the first decorativemember 72 and the second decorative member 73. When the ejectionassembly 70 protrudes out of the first mounting portion 50, the at leastone lifting mechanism 74 may drive the first decorative member 72 andthe second decorative member 73 to move away from each other, such thatthe first decorative member 72 may be substantially flush with an outersurface of the screen assembly 30, and the second decorative member 73may be substantially flush with an outer surface of the back cover 40.In this way, the first step 31 and the second step 41 may be eliminatedand disappeared. In this embodiment, two driving mechanisms 71 and twolifting mechanisms 74 may be provided.

More specifically, as shown in FIG. 9B, each driving mechanism 71 mayinclude a driving member 711, a fixing member 713, and a transmissionshaft 715. Each driving member 711 may be arranged in the correspondingsecond reserved portion 25. Each fixing members 713 may be arranged inthe corresponding first reserved portion 17. Each driving member 711 maybe fixed to the middle frame 10 via the corresponding fixing member 713.One end of the transmission shaft 715 may be adjacent to an output shaftof the driving member 711 in the first direction 200. The transmissionshaft 715 may pass through the first end 13 of the middle frame 10 andfurther extend out of the middle frame 10. More specifically, the firstend 13 of the middle frame 10 may define at least one through hole 19.The at least one through hole 19 may be defined corresponding to thetransmission shaft 715 of the at least one driving mechanism 71. Theother end of the transmission shaft 715 may extend through thecorresponding through hole 19 and further extend out of the middle frame10. More specifically, in some embodiments, the driving member 711 maybe an electric motor. However, in other embodiments, it can beunderstood that, the driving member 711 may also be a hydraulic motor orthe like. The types of the driving member 711 may be set as required.

Further, as shown in FIG. 7, each lifting mechanism 74 may include afirst bevel gear 741, a second bevel gear 743, a first lead screw 745,and a push rod 747. The push rod 747 may be in shape of a wedge. In someembodiments, the first bevel gear 741 may be disposed along the firstdirection 200, that is, an axis of the first bevel gear 741 may besubstantially parallel to the first direction 200. The first bevel gear741 may be coupled to one driving mechanism 71. More specifically, thefirst bevel gear 741 may be coupled to one end of the transmission shaft715 of the driving mechanism 71 that extends out of the middle frame 10.The second bevel gear 743 may be disposed along the second direction300, that is, an axis of the second bevel gear 743 may be substantiallyparallel to the second direction 300. The second bevel gear 743 may beengaged with the first bevel gear 741, such that a 90-degree turn may beachieved. The first lead screw 745 may be disposed coaxially with thesecond bevel gear 743. More specifically, the second bevel gear 743 maybe disposed at one end of the first lead screw 745 and furtherintegrated with the first lead screw 745. Of course, in otherembodiments, the second bevel gear 743 and the first lead screw 745 mayalso be two independent and separated components, that is, the secondbevel gear 743 and the first lead screw 745 may be two componentsmanufactured separately, and the second bevel gear 743 may be furthersleeved on the first lead screw 745.

Referring to FIG. 7 further, the first lead screw 745 may define a firstgroove 7451, and the first groove 7451 may be in shape of a spiral. Thepush rod 747 may be adjacent to the first lead screw 745 and disposedalong the second direction 300 (that is, an extending direction of thepush rod 747 may be parallel to the second direction 300). One end ofthe push rod 747 may be inserted in the first groove 7451, the other endof the push rod 747 may cooperate with the first decorative member 72and the second decorative member 73, and push the first decorativemember 72 and the second decorative member 73 to move away from eachother.

More specifically, the push rod 747 may include a rod body 7470, a firstinserting portion 7471 arranged at a side wall of the rod body 7470 thatfaces towards the first lead screw 745, and a pushing portion 7473arranged at one end of the rod body 7470. The pushing portion 7473 maybe in shape of a wedge. The inserting portion 7471 may be inserted intothe first groove 7451. The pushing portion 7473 may cooperate with thefirst decorative member 72 and the second decorative member 7. Morespecifically, when the pushing portion 7473 is driven to move towardsthe first decorative member 72 and the second decorative member 73, thepushing portion 7473 may firstly contact with the second decorativemember 73 (as shown in FIGS. 10A and 10B; at this time, the electronicdevice is in a second state), thereby pushing the second decorativemember 73 to move away from the first decorative member 72. After that,the pushing portion 7473 may further contact with both the seconddecorative member 73 and the first decorative member 72 (as shown inFIGS. 11A and 11B; at this time, the electronic device is in a thirdstate), thereby pushing the second decorative member 73 and the firstdecorative member 72 to move away from each other simultaneously, thatis, both the second decorative member 73 and the first decorative member72 will move at this time. In some embodiments, during the movement ofthe first decorative member 72 and the second decorative member 73, theposition of screen assembly 30 and that of the back cover 40 mayremain/keep unchanged.

More specifically, the pushing portion 7473 may include a pair of firstinclined surfaces 7475 arranged symmetrically about a central axis ofthe pushing portion 7473. The first decorative member 72 may include asecond inclined surface 721, and the second decorative member 73 mayinclude a third inclined surface 731. The second inclined surface 721may cooperate with one of the pair of first inclined surfaces 7475,while the third inclined surface 731 may cooperate with the other of thepair of first inclined surfaces 7475. When the push rod 747 is driven tomove such that the pair of first inclined surfaces 7475 of the pushingportion 7473 respectively move toward the second inclined surface 721and the third inclined surface 731, one of the pair of first inclinedsurfaces 7475 of the pushing portion 7473 may firstly get into contactwith the third inclined surface 731 of the decorative member 73 (asshown in FIGS. 10A and 10B), thereby pushing the second decorativemember 73 to move away from the first decorative member 72. The other ofthe pair of first inclined surfaces 7475 of the pushing portion 7473 mayalso gradually get close to the second inclined surface 721 of the firstdecorative member 72, and further get into contact with the secondinclined surface 721 of the first decorative member 72 (as shown inFIGS. 11A and 11B). At this time, the pair of inclined surfaces 7475 ofthe first pushing portion 7473 may abut against both the second inclinedsurface 721 of the first decorative member 72 and the third inclinedsurface 731 of the second decorative member 73, thereby pushing thefirst decorative member 72 and the second decorative member 73 to moveaway from each other, and thus the first step 31 and the second step 41may be eliminated correspondingly.

In some embodiments, as shown in FIG. 7, the ejection assembly 70 mayfurther include a bracket 75. The bracket 75 may include an outer frame751 and a supporting body 753. The outer frame 751 may extend around aperiphery of the supporting body 753, and further protrude beyond thesupporting body 753 in a direction perpendicular to the plane in whichthe first direction 200 and the second direction 300 are located. Thelifting mechanism 74 may be disposed on the supporting body 753. Thefirst decorative member 72 and the second decorative member 73 may berespectively located at two opposite sides of the supporting body 753.The first decorative member 72 and the second decorative member 73 mayrespectively match with the two opposite sides of the outer frame 751.

More specifically, the supporting body 753 may have a first surface 7531and a second surface 7533 opposite to the first surface 7531. The firstsurface 7531 may face towards the second decorative member 73, while thesecond surface 7533 may face towards the first decorative member 72. Afirst receiving portion 7530, a second receiving portion 7532, and athird receiving portion 7534 may be sequentially arranged on the firstsurface 7531 of the supporting body 753 and correspond to each liftingmechanism 74. Each first bevel gear 741 may be disposed in the firstreceiving portion 7530. Each second bevel gear 743 and each first leadscrew 745 may be disposed at one side of the second receiving portion7532. A portion of each push rod 747 may be disposed at the other sideof the second receiving portion 7532, and the other portion of each pushrod 747 may be disposed in the corresponding third receiving portion7534. Each push rod 747 may extend out of the corresponding thirdreceiving portion 7534 and further cooperate with the first decorativemember 72 and the second decorative member 73. In some embodiments, thefirst receiving portion 7530, the second receiving portion 7532, and thethird receiving portion 7534 may be configured to be a structuredefining a receiving groove.

In some embodiments, the first receiving portion 7530 may extend alongthe first direction 200 (that is, an axis of the first receiving portion7530 may be substantially parallel to the first axis direction 200). Thesecond receiving portion 7532 may communicate with the first receivingportion 7530, and extend along the second direction 300 (that is, anaxis of the second receiving portion 7532 may be substantially parallelto the second direction 300). The third receiving portion 7534 may bedisposed at one side of the second receiving portion 7532 that is awayfrom the first receiving portion 7530, and further communicate with thesecond receiving portion 7532. The third receiving portion 7534 mayextend through two opposite side faces of the supporting body 753.

More specifically, the rod body 7470 and the first inserting portion7471 of each push rod 747 may be disposed at the other side of thesecond receiving portion 7532, and the pushing portion 7473 of each pushrod 747 may be disposed in the third receiving portion 7534. The pair offirst inclined surfaces 7475 of the pushing portion 7743 may protrudeout from an opening of the third receiving portion 7534, andrespectively match and cooperate with the second inclined surface 721 ofthe first decorative member 72 and the third inclined surface 731 of thesecond decorative member 73.

In some embodiments, referring to FIG. 4A and FIG. 4B, the supportingbody may further include a guiding block 7535, and the guiding block7535 may be disposed on a bottom wall of the second receiving portion7532. Each push rod 747 may define a guiding groove 7477 in the seconddirection 300. Each guiding block 7535 may be inserted into thecorresponding guiding groove 7477. When each push rod 747 is driven bythe first lead screw 745to slide along the second direction 300, theguiding block 7535 may provide a guide to the movement of the push rod747.

In some embodiments, the first surface 7531 of the supporting body 753may further define a mounting hole 7436. A mounting post 7453 may bedisposed at one end of the first lead screw 745 that is away from thesecond bevel gear 743. The first lead screw 745 may be mounted in themounting hole 7436 via the mounting post 7543.

In some embodiments, referring to FIG. 7 together, the ejection assembly70 may further include at least one protective cover 76. The protectivecover 76 may be disposed on the first surface 7531 of the supportingbody 753, cover the first receiving portion 7530 and the secondreceiving portion 7532, and be located between the supporting body 753and the second decorative member 73. In this embodiment, two protectivecovers 76 may be provided.

In some embodiments, the second surface 7533 of the supporting body 753may be provided with a fourth receiving portion 7537. The at least onefunctional device (such as the camera 723 and the receiver 725) may bedisposed at one side of the first decorative member 72 that is close tothe supporting body 753. When the first decorative member 72 is disposedon the supporting body 753, the camera 723 and the receiver 725 may bedisposed in the fourth receiving portion 7537.

In some embodiments, a first magnetic member (not shown) may be disposedin the receiver 725. The ejection assembly 70 may also include a secondmagnetic member 77. The second magnetic member 77 may be disposed on thesecond decorative member 73. A reserved portion 7538 may be arranged onthe supporting body 753 at a position corresponding to the secondmagnetic member 77. When the first decorative member 72 and the seconddecorative member 73 are driven to move away from each other and thepush rod 747 does not push against the first decorative member 72 andthe second decorative member 73, the first magnetic member and thesecond magnetic member 77may attract each other, such that the firstdecorative member 72 and the second decorative member 73 may move towardeach other, and thus the first decorative member 72 and the seconddecorative member 73 may be reset.

In some embodiments, referring to FIG. 8, FIG. 9A, FIG. 9B, FIG. 10A andFIG. 10B together, the ejection assembly 70 may further include anejecting mechanism 78. The ejecting mechanism 78 may include at leastone second lead screw 781. Each second lead screw 781 may be disposedbetween the corresponding driving mechanism 71 and the first bevel gear741. The first bevel gear 741 may be disposed at the end of the secondlead screw 781 (that is, one end of the second lead screw 781 that isaway from the driving member 711 of the driving mechanism 71). Eachsecond lead screw 781 may also, define a second groove 7811, and thesecond groove 7811 may also be in shape of a spiral. The supporting body753 may further include a second inserting portion 7539, and the secondinserting portion 7539 may be disposed corresponding to each second leadscrew 781. In some embodiments, the second inserting portion 7539 may bein shape of an L, and each second inserting portion 7539 may be insertedinto the corresponding second groove 7811. In this case, two second leadscrews 781 may be provided.

More specifically, referring to FIG. 7, FIG. 9A and FIG. 9B together,the first groove 7451 may include a slow-moving section 7455 and a firstfast-moving section 7457. The second groove 7811 may include a secondfast-moving section 7813 and an idle section 7815. The slow-movingsection 7455 of the first groove 7451 may correspond to the secondfast-moving section 7813 of the second groove 7811. The firstfast-moving section 7457 of the first groove 7451 may correspond to theidle section 7815 of the second groove 7811. In this case, a pitch ofthe slow-moving section 7455 may be less than a pitch of the firstfast-moving section 7457, and less than a pitch of the secondfast-moving section 7813. Therefore, a moving speed of the push rod 747in the slow forward section may be less than the moving speed of thepush rod 747 in the first fast-moving section 7457, and also less than amoving speed of the second plug section 7539 in the second fast-movingsection 7813.

Two free ends of the outer frame 751 may respectively protrude outwardlysuch that a guiding portion 7511 may be formed. Each guiding portion7511 may be disposed adjacent to one second plug 7539. Each guidingportion 7511 may be inserted into one side of the first end 13 of themiddle frame 10, and thus a smooth outer surface may be formed by theguiding portion 7511 and the middle frame 10.

Referring to FIG. 4A and FIG. 4B together, during the operation, whenthe electronic device is in the first state, the driving mechanism 71may rotate in a first direction to drive the second lead screw 781 torotate, and the second lead screw 781 may in turn drive the bracket 75,the lifting mechanism 74, the first decorative member 72, the seconddecorative member 73, the protective cover 76, and the second magneticmember 77 to move together away from the middle frame 10. At this time,the second inserting portion 7539 is located in the second fast-movingsection 7813 of the second groove 7811 of the second lead screw 781, andthe first inserting portion 7471 of the push rod 747 is located in theslow-moving section 7455 of the first groove 7451 of the first leadscrew 745. In this way, other components of the ejection assembly 70except the driving mechanism 71 may be ejected from the first mountingportion 50 of the electronic device 100. At this time, the push rod 747is still at a distance from the corresponding second inclined surface721 and the third inclined surface 731, and the push rod 747 will notpush the first decorative member 72 and the second decorative member 73to move away from each other.

Referring to FIGS. 10A, 10B, 11A and 11B, when the second insertingportion 7539 enters the idle section 7815 from the second fast-movingsection 7813 of the second groove 7811 of the second lead screw 781, thefirst inserting portion 7471 of the push rod 747 may gradually enter thefirst fast-moving section 7457 from the slow-moving section 7455 of thefirst groove 7451 of the first lead screw 745. At this time, one of thepair of first surfaces 7475 of the push rod 747 may firstly get intocontact with the corresponding third inclined surface 731 (as shown inFIGS. 10A and 10B, and the electronic device is in the second state atthis time). The other of the pair of first inclined surfaces 7475 of thepush rod 747 may be subsequently get into contact with the correspondingsecond inclined surface 721 (as shown in FIGS. 11A and 11B, and theelectronic device is in the third state at this time). In this way, thepush rod 747 may push the first decorative member 72 and the seconddecorative member 73 to move away from each other, such that the firstdecorative member 72 may be substantially flush with the outer surfaceof the screen assembly 30, and the second decorative member 73 may besubstantially flush with the outer surface of the back cover 40. In thisway, the first step 31 and the second step 41 may be eliminated anddisappeared.

When the ejection assembly 70 needs to be received in the first mountingportion 50, the driving mechanism 71 may rotate in a reversed direction,and the moving processes of all the relative components are equivalentto the reverse processes of the above processes, and will not bedescribed herein again. The difference lies in that, when the push rod747 is driven to move away from the first decorative member 72 and thesecond decorative member 73, the first magnetic member and the secondmagnetic member 77 may attract each other, such that the firstdecorative member 72 and the second decorative member 73 may move towardeach other, and thus the first decorative member 72 and the seconddecorative member 73 may be reset. At this time, when the secondinserting portion 7539 enters the second fast-moving section 7813 fromthe idle section 7815 of the second groove 7811 of the second lead screw781, the first inserting portion 7471 of the push rod 747 may graduallyenter the slow-moving section 7455 from the first fast-moving section7457 of the first groove 7451 of the first lead screw 745, and thedriving mechanism 71 may drive other components of the ejection assembly70 except the driving mechanism 71 to be gradually received in the firstmounting portion 50.

In the above embodiment, the at least one functional device includes thecamera 723 and the receiver 725. Of course, in other embodiments, the atleast one functional device may further include at least one functionalcomponent selected from a group consisting of such as an irisrecognition module, a face recognition module, a flash, a microphone, aphotoreceptor, a fingerprint module, and a button.

In another aspect, an electronic device may be provided. The electronicdevice may include: a screen assembly 30, a back cover 40 opposite tothe screen assembly 30, a middle frame 10 sandwiched between the screenassembly 30 and the back cover 40, and an ejection assembly 70. In thisembodiments, a mounting portion 50 may be formed by the screen assembly30, the middle frame 10, and the back cover 40. The ejection assembly 70may be movably disposed in the mounting portion 50, such that theejection assembly 70 is capable of extending out of the mounting portion50 or retracting into the mounting portion 50. The ejection assembly 70may include: a first decorative member 72, a second decorative member 73opposite to and spaced apart from the first decorative member 72, atleast one lifting mechanism 74, and at least one driving mechanism 71.The first decorative member 72 and the second decorative member 73 maybe movable toward each other or away from each other. The at least onelifting mechanism 74 may be disposed between the first decorative member72 and the second decorative member 73, and configured to drive thefirst decorative member 72 and the second decorative member 73 to moveaway from each other when the ejection assembly 70 extends out of themounting portion 50, such that the first decorative member 72 may besubstantially flush with the screen assembly 30, and the seconddecorative member 73 may be substantially flush with the back cover 40.The at least one driving mechanism 71 may be connected to each of the atleast one lifting mechanism 74.

In the ejection assembly 70 and the electronic device 100 having theejection assembly 70, after the ejection assembly 70 is ejected from thefirst mounting portion 50 of the electronic device 100, the liftingmechanism 74 may be driven by the driving mechanism 71 to push the firstdecorative member 72 and the second decorative member 73 to move awayfrom each other, such that the first decorative member 72 may besubstantially flush with the outer surface of the screen assembly 30,and the second decorative member 73 may be substantially flush with theouter surface of the back cover 40. In this way, it is possible toincrease the screen ratio without affecting an overall appearance of theelectronic device 100, and the sound quality and the user experience maybe improved.

The above is a preferred embodiment of the present disclosure. It shouldbe noted that, those skilled in the art can also make severalimprovements and modifications without departing from the principles ofthe present disclosure. All these shall be covered within the protectionscope of the present disclosure.

What is claimed is:
 1. An electronic device, comprising: a screen assembly, a back cover, opposite to the screen assembly, a middle frame, sandwiched between the screen assembly and the back cover; wherein a length of the middle frame in a first direction is less than a length of the screen assembly in the first direction, and less than a length of the back cover in the first direction, such that a mounting portion is formed by the screen assembly, the middle frame, and the back cover; and an ejection assembly, movably disposed in the mounting portion and comprising: at least one driving mechanism; a first decorative member; a second decorative member, opposite to and spaced apart from the first decorative member, wherein the first decorative member and the second decorative member are movable toward each other or away from each other; and at least one lifting mechanism, disposed between the first decorative member and the second decorative member; wherein each of the at least one lifting mechanism is connected to the corresponding driving mechanism; driven by the at least one driving mechanism, the at least one lifting mechanism is capable of driving the first decorative member and the second decorative member to move away from each other, such that the first decorative member is substantially flush with the screen assembly, and the second decorative member is substantially flush with the back cover.
 2. The electronic device of claim 1, wherein each of the at least one lifting mechanism comprises: a first bevel gear, coupled to one of the at least one driving mechanism and having an axis substantially parallel to the first direction; a second bevel gear, engaged with the first bevel gear and having an axis substantially parallel to a second direction; wherein the second direction is perpendicular to the first direction; a first lead screw, disposed coaxially with the second bevel gear, and defining a first groove; and a push rod, adjacent to the first lead screw and extending in a direction substantially parallel to the second direction; wherein one end of the push rod is inserted in the first groove, and the other end of the push rod cooperates with the first decorative member and the second decorative member, such that the push rod pushes the first decorative member and the second decorative member to move away from each other.
 3. The electronic device of claim 2, wherein the push rod comprises: a rod body, a first inserting portion, disposed at a side wall of the rod body that faces towards the first lead screw and inserted into the first groove; and a pushing portion, disposed at one end of the rod body and cooperating with the first decorative member and the second decorative member to push the first decorative member and the second decorative member to move away from each other.
 4. The electronic device of claim 3, wherein the pushing portion comprises a pair of first inclined surfaces opposite to each other; the first decorative member comprises a second inclined surface, and the second decorative member comprises a third inclined surface; the second inclined surface cooperates with one of the pair of first inclined surfaces, while the third inclined surface cooperates with the other of the pair of first inclined surfaces.
 5. The electronic device of claim 2,wherein each of the at least one driving mechanism comprises a driving member, a fixing member, and a transmission shaft; wherein the driving member is disposed on the middle frame via the fixing member, and the transmission shaft is adjacent to an output shaft of the driving member along the first direction; the transmission shaft passes through the middle frame and is further connected to the first bevel gear.
 6. The electronic device of claim 2, wherein the ejection assembly further comprises a bracket, and the bracket comprises an outer frame and a supporting body; the outer frame extends around a periphery of the supporting body, and the lifting mechanism is disposed on the supporting body; wherein a mounting post is disposed at one end of the first lead screw that is away from the second bevel gear, and the supporting body defines a mounting hole; the first lead screw is mounted in the mounting hole via the mounting post.
 7. The electronic device of claim 6, wherein the supporting body has a first surface and a second surface opposite to the first surface; a first receiving portion, a second receiving portion, and a third receiving portion are sequentially arranged on the first surface of the supporting body and correspond to each of the at least one lifting mechanism; the first receiving portion extends along the first direction; the second receiving portion is communicated with the first receiving portion, and extends along the second direction; the third receiving portion is disposed at one side of the second receiving portion that is away from the first receiving portion, communicated with the second receiving portion, and extends through two opposite side faces of the supporting body; the first bevel gear is disposed in the first receiving portion, and the second bevel gear and the first lead screw are disposed at one side of the second receiving portion; a portion of the push rod is disposed at the other side of the second receiving portion, and the other portion of the push rod is disposed in the third receiving portion; the push rod extends out of the third receiving portion, and cooperates with the first decorative member and the second decorative member.
 8. The electronic device of claim 7, wherein the supporting body further comprises a guiding block, and the guiding block is disposed on the second receiving portion; the push rod defines a guiding groove in the second direction, and the guiding block is inserted into the guiding groove.
 9. The electronic device of claim 7, wherein the ejection assembly further comprises a protective cover; the protective cover is disposed on the first surface, located between the supporting body and the second decorative member, and covers the first receiving portion and the second receiving portion.
 10. The electronic device of claim 6, wherein the supporting body has a first surface and a second surface opposite to the first surface; a fourth receiving portion is arranged on the second surface of the supporting body; at least one functional device is disposed at one side of the first decorative member that is close to the supporting body; when the first decorative member is disposed on the supporting body, the at least one functional device is disposed in the fourth receiving portion.
 11. The electronic device of claim 10, wherein one of the at least one functional device is provided with a first magnetic member, and the ejection assembly further comprises a second magnetic member; the second magnetic member is disposed on the second decorative member; a reserved portion is arranged on the supporting body at a position corresponding to the second magnetic member; when the first decorative member and the second decorative member are driven to move away from each other and the push rod does not push against the first decorative member and the second decorative member, the first magnetic member and the second magnetic member attract each other, such that the first decorative member and the second decorative member move toward each other, and the first decorative member and the second decorative member are reset.
 12. The electronic device of claim 3, wherein the ejection assembly further comprises: an ejecting mechanism, comprising at least one second lead screw; wherein each of the at least one second lead screw is disposed between the driving mechanism and the first bevel gear; each of the at least one second lead screw rod defines a second groove; and a second inserting portion, disposed corresponding to the at least one second lead screw and inserted into the second groove.
 13. The electronic device of claim 12, wherein the first groove comprises a slow-moving section and a first fast-moving section, and the second groove comprises a second fast-moving section and an idle section; when the first inserting portion is located in the slow-moving section, the second inserting portion is located in the second fast-moving section; when the first inserting portion is located in the first fast-moving section, the second inserting portion is located in the idle section.
 14. The electronic device of claim 12, wherein the ejection assembly further comprises a bracket, and the bracket comprises an outer frame and a supporting body; the outer frame extends around a periphery of the supporting body; each free end of the outer frame protrudes outwardly to form a guiding portion, and the guiding portion is disposed adjacent to the second inserting portion; the guiding portion is inserted into one side of the middle frame, such that a smooth outer surface is formed by the guiding portion and the middle frame.
 15. An electronic device, comprising: a screen assembly, a back cover, opposite to the screen assembly, a middle frame, sandwiched between the screen assembly and the back cover; wherein the middle frame comprises a pair of spaced and parallel external walls engaged with the screen assembly and the back cover; each of the external walls has a top lower than tops of the screen assembly and the back cover, and a mounting portion is defined by the tops of the screen assembly, the external walls, and the back cover; an ejection assembly, movably disposed in the mounting portion, and having a first position at which the ejection assembly partially extends out of the mounting portion and a second position at which the ejection assembly is received in the mounting portion; wherein the ejection assembly comprises: a first decorative member; a second decorative member, opposite to and spaced apart from the first decorative member, wherein the first decorative member and the second decorative member are movable toward each other or away from each other; at least one lifting mechanism, disposed between the first decorative member and the second decorative member, and configured to drive the first decorative member and the second decorative member to move away from each other when the ejection assembly is at the first position, such that the first decorative member is substantially flush with the screen assembly, and the second decorative member is substantially flush with the back cover; and at least one driving mechanism, connected to each of the at least one lifting mechanism; and at least one functional device, mounted on the ejection assembly; when the ejection assembly is at the first position, the at least one functional device is exposed out of the screen assembly.
 16. The electronic device of claim 15, wherein each of the at least one lifting mechanism comprises: a first bevel gear, coupled to one of the at least one driving mechanism and having an axis substantially parallel to the first direction; a second bevel gear, engaged with the first bevel gear and having an axis substantially parallel to a second direction; wherein the second direction is perpendicular to the first direction; a first lead screw, disposed coaxially with the second bevel gear, and defining a first groove; and a push rod, adjacent to the first lead screw and extending in a direction substantially parallel to the second direction; wherein one end of the push rod is inserted in the first groove, and the other end of the push rod cooperates with the first decorative member and the second decorative member, such that the push rod pushes the first decorative member and the second decorative member to move away from each other.
 17. The electronic device of claim 16, wherein the push rod comprises: a rod body, a first inserting portion, disposed at a side wall of the rod body that faces towards the first lead screw and inserted into the first groove; and a pushing portion, disposed at one end of the rod body and cooperating with the first decorative member and the second decorative member to push the first decorative member and the second decorative member to move away from each other; wherein the pushing portion comprises a pair of first inclined surfaces opposite to each other; the first decorative member comprises a second inclined surface, and the second decorative member comprises a third inclined surface; the second inclined surface cooperates with one of the pair of first inclined surfaces, while the third inclined surface cooperates with the other of the pair of first inclined surfaces.
 18. The electronic device of claim 17, wherein the ejection assembly further comprises: an ejecting mechanism, comprising at least one second lead screw; wherein each of the at least one second lead screw is disposed between the driving mechanism and the first bevel gear; each of the at least one second lead screw rod defines a second groove; and a second inserting portion, disposed corresponding to the at least one second lead screw and inserted into the second groove.
 19. The electronic device of claim 18, wherein the first groove comprises a slow-moving section and a first fast-moving section, and the second groove comprises a second fast-moving section and an idle section; when the first inserting portion is located in the slow-moving section, the second inserting portion is located in the second fast-moving section; when the first inserting portion is located in the first fast-moving section, the second inserting portion is located in the idle section.
 20. An ejection assembly for an electronic device, the electronic device comprising a back cover, a screen assembly covering the back cover, and a middle frame sandwiched between the screen assembly and the back cover; wherein a length of the middle frame in a first direction is less than a length of the screen assembly in the first direction, and less than a length of the back cover in the first direction, such that a mounting portion is formed by the screen assembly, the middle frame, and the back cover; the ejection assembly being movably disposed in the mounting portion and having a first position at which the ejection assembly partially extends out of the mounting portion and a second position at which the ejection assembly is received in the mounting portion; the ejection assembly comprising: at least one driving mechanism; a first decorative member; a second decorative member, opposite to and spaced apart from the first decorative member, wherein the first decorative member and the second decorative member are movable toward each other or away from each other; and at least one lifting mechanism, disposed between the first decorative member and the second decorative member; wherein each of the at least one lifting mechanism is connected to the corresponding driving mechanism; driven by the at least one driving mechanism, the at least one lifting mechanism is capable of driving the first decorative member and the second decorative member to move away from each other when the ejection assembly is at the first position, such that the first decorative member is substantially flush with the screen assembly, and the second decorative member is substantially flush with the back cover. 